Temperature-regulator.



F. T. KITCHEN.

TEMPERATURE REGULATOR.

APPLICATION FILED APR. 1. 1915.

1,152,027. Patented Aug. 31,1915. A: I 4

B B [Z91].

INVENTOR fwmwszi w l w/mifl M, LL A iomeys,

UNITED STATES PATENT OFFICE.

FREDERICK T. KITCHEN. OF

NEW YORK, N. Y., ASSIGNOR TO GOLD CAR HEATING & LIGHTING COMPANY, OF NEWYORK, N. Y.,

A CORPORATION OF NEW YORK.

TEMPERATURE-REGULATOR.

Specification of Letters Patent.

Patented Aug. .31 1915.

To Ill/.IP/HIl/I it may concern l c it known that l. Fnnmcuicn T.Krrcurx a citizen of the l nited States of America, residing in \VestNew Brighton, Staten Island, in the borough of Richmond, city and Stateof New York. have invented certain new and useful lmprovements inTemperature-ltegulators. of which the following is a specification.

.\Iy invention relates to temperature regulators for use in connectionwith automatieally operated electric heating systems and has for itsobject to provide means whereby to reduce arcing and sparking in thethermostatic controlling devices for said regulator.

My invention is particularly adapted for use in connection withthermostatic devices for controlling electric heating systems. It isapplicable for use in car heating systems, either surface or railwaycars. or with the heating systems used for h ating buildings, etc. lupractice the h *ating circuit usually contains a magnetic switch. andthis switch is controlled by the operation of a thermostat. The magneticswitch requires considerable current to start it. in the neighborhood of50 watts. but a less current. say 13 watts. will be sulticicnt to holdthe armature to the coreat'ter the. magnet is energi'/.ed. The powerobtained l'rom the slight varia-' tious in temperature at which it isdesired that the thermostat should. operate is insutlicieut to separatethe thermostatic contact points with the desired quick break.Therel'ore. il a current is passing through the shunt containing thethermostat. sutlieient to energize the magnet. destructive arcing willtake place between the thermostatic contact points when they areseparated by the action ol the thermostat and they will be destro \'ed.

The invention consists in providing means wherebv a'lter the thermostathas closed the shunt circuit and sull'icient current has passedtherethrough to energize the magnet, a resistance is cm. into saidcircuit by the action of the magnet and the ciu'rentthereafter flowingthrtnighthe shunt is lessened so that upon the separation of thethermostatic contact points no destructive arcing will take. place. I

A desirable form in which the invention may be. embodied is illustratedin the" accompanying dra\\'ing wherein;-

l igure 1 is a diagrammatic representation of the wiring; and Fig. 2 isa plan-yiew-ef the magnetic switch and resistance controlling devices.

In the diagrammatic view of the wiring the source of electricityindicated at A may be an overhead trolley. The heating circuit from thispasses through switch B, wires C, I). the controlling apparatus E, andfrom thence by wire F to heater G and the ground. shunt circuit H leadsfrom the wire to a magnet I in the controller E. This shunt circuitcontains a thermostat J which is'not illustrated specifically as manytypes ol such thermostats are known and are capable ot being utilized inconnection with my invention. and as the particular type of thermostatforms no part of this present invention. The thermostat is controlled asusual by the temperature of the surrounding atmosphere and as the saidtemperature gets colder the thermostat closes the electric circuit-H andenergizesthe magnet I, and as the temperature gets hotter it opens thesaid circuit and deiiuergizes the magnet. The shunt circuit H isconnected to the magnet I and a ground wire K leads from the said magnetthrough the resistance L to the ground. A shunt M (shown in dotted linesin Fig. l) is looped into the said ground circuit K around theresistance L and contains a spring switch N. Shunt M; switch N. andresistance L are mounted on insulated block The heater circuit D leadsinto the controller where it is connected to the binding post from whichit passes through wire P to the magnetic blow-out Q and from thence toterminal R of the main heating switch. The other and movable. terminal Rof the said heating switch is connected to the armature l of thesolenoid 1 so as to be operated thereby and close the said switch whenthe magnet is energized, and when the switch is closed the currentpasses from the said contact points R. R to switch arm S, wires T, F.heater (l and the ground. Switch R and blow-out Q are mounted oninsulated block V.

Pivoted to the armature 1 of the magnetic solenoid wlnch controls switcharm S is a rocking lever I which is pivotally mounted in a fixed part oithe device and is provided with a tail-piece l which is adapts ed topress againstthe spring \"itch N when the magnet is i-Energized and openthe shunt or loop M around the r-; '.;tance i) in the ground circuit Ktrom the magnet 1, and accordingly cut the said resistance L into thecircuit.

In the opei'atioirot my device the switch B being closed, current will.be taken at It and upon the temperature in the apartment containing thethermostat d falling to a suliicient extent so that additional heat isrequired for-the said apartment, the said ther mostat will close thecircuit H passing through the n'iagnet I and suiiicient current willpass through the shunt ii to energize the magnet, and thence throughcircuit it, spring switch N and loop M to the ground. The said circuit Hwiil pass suliicient current to operate the magnet which will be in theneighborhood of watts. Thereupon the magnet being energized will attractits armature 1 closing the heating circuit at R, R and causing a circuitto he closed from the wire (.1 tirough D, t), I R. R, ta, T, l heater (land the ground. The tailpiece ot'the lever i will. when the magnet isenergized press against spring switch N, opening the loop around theresistance L a I and causing the Pl'ClHt l'ltml the magnet to passthrough wire K, and resistance l. to the ground. 'ilhereimon thesaidresistance rill cause a less current to flow through the shunt circuit Hwhich, however, will he sutiicient to hold the armature 1 Vihem theapartment hecon'ies suiiiciently heated the contact points in thethermostat will sepaate and the lessened current then flowing throughthe shunt it will cause this operation to lc unaccoml'ianicd by anydestructive sparking. Thcreupon, the magnet i will he dei nergized, thearnndiurel will drop, liirealiing the heating circuit. The foregoingoperation will he repeated as trequently as the temperature in the cardrops, indicating that a further supply of hurt. is necessary.

I have illustrated the most desirable form. now known to me ofconstructing my invention, hut the same may he modified andequivalent.devices substituted for those now employed within the limitsof the appended. claims. p 7

What I claim is LA. temperature regulator comprising a heating circuithaving an electrical heater therein, a shunt circuit, a thermostat insaid gized upon the closing ot the shunt circuit by the thermostat, andmains tor throwing resistance into the shunt circuit when the saidmagnet energized.

2. [i temperature regulator comprising a heating circuit having anelectrical heater therein, a shunt circuit, a thermostat in said shuntcircuit a ll'ected hy the temperature of the apartment. a magnet in saidshunt cir .cuit controlled wholly by said thermostat and energized onlywhen said thermostat closes said shunt and dei nergized when thethermostat opens said shunt, a switch adapted to close the heatercircuit when the magnet energized upon the closing oi the shunt circuitby the thermostat, a resistance in the ground wire *l'rom said magnet. ashunt around said resistance, and a bar pirotally mounted in a liXedpart ot the device and operatirely connected to the armature and adaptedwhen the armature is attracted upon the energizing ot' the magnet toclose the h ater switch and at the same time to open the shunt aroundthe resistance.

A temperature regulator comprising a l ating circuit having anelectrical heater therein. a shunt circuit, a thermostat in said shuntcircuit aliected by the temperature of the apartment. a magnet in saidshunt circuit controlled wholly hy said thermostat and energized onlywhen said thermostat closes said shunt and deiinergized when thethern'iostat opens said shunt, a magnet in saidshunt, a switch in theheating circuit operated by the armatme of said magnet and adapted toclose the halting circuit when the magnet is energized, a resistance inthe ground wire irom said magnet, a shunt around said resistance, aspring switch in said shunt and a tail-piece to said heating circuitswitch adapted to open said spring switch when the magnet is energized.

In witness whereof, I have hereunto signed my name in the presence oftwo subscribing witnesses.

FREDERICK T. KITCHEN lVitnesses HENRY Iii. Torin, F in ii nrrn.

